A small Date (proxy) helper

DateProxyFactory.js

function dateProxyFactory() {
  const props = {
    year: (d, v) => v && d.setFullYear(v) || d.getFullYear(),
    month: (d, v) => v && d.setMonth(v - 1) || d.getMonth() + 1,
    date: (d, v) => v && d.setDate(v) || d.getDate(),
    hours: (d, v) => v && d.setHours(v) || d.getHours(),
    minutes: (d, v) => v && d.setMinutes(v) || d.getMinutes(),
    seconds: (d, v) => v && d.setSeconds(v) || d.getSeconds(),
    ms: (d, v) => v && d.setMilliseconds(v) || d.getMilliseconds(),
    all: d => [ d.getFullYear(), d.getMonth(), d.getDate(),
      d.getHours(), d.getMinutes(), d.getSeconds(), d.getMilliseconds() ],
    dt: d => d,
    local: d => d.toLocaleString()
  };
  return date => {
    const dProxy = {
      get: (obj, name) => props[name]?.(obj) ?? obj[name],
      set: ( obj, name, value) => props[name]?.(obj, value),
    };
    return new Proxy(date, dProxy);
  };
}